한국해양대학교

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위험전압 측정시스템의 설계 및 제작

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dc.contributor.author 장운용 -
dc.date.accessioned 2017-02-22T06:49:23Z -
dc.date.available 2017-02-22T06:49:23Z -
dc.date.issued 2011 -
dc.date.submitted 56959-08-17 -
dc.identifier.uri http://kmou.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002175617 ko_KR
dc.identifier.uri http://repository.kmou.ac.kr/handle/2014.oak/9867 -
dc.description.abstract The ground system sets the reference potential in an electric circuit or protects devices by suppressing ground potential rise, dissipating fault current to earth. Currently, the performance of ground system is mainly evaluated as the ground resistance in low frequency region around 100[Hz]. However the ground resistance does not consider the ground potential rise, measurement of the ground resistivity, the ground impedance, and the risk voltage like the touch- and the step-voltage is necessary to evaluate the performance of ground system. This thesis, therefore, dealt with the design and fabrication of a risk voltage measurement system (RVMS) which analyzes all the parameters above. The RVMS consists of a power source, a data acquisition module (DAQ), a signal processor, and a display. The power source can supply 300[Vrms] and 1.4[A] maximum in ranges from 40[Hz] to 1[kHz]. The DAQ module having resolution of 400 [kS/s] and 16 bit is equipped with 6 ports for voltage and a port for current. Also, a noise elimination algorithm of digital band-pass filter is applied to minimize a measurement error caused by external current flowing earth. The performance of the RVMS is evaluated by measurement of the ground resistivity, the ground impedance and the risk voltage according to the IEEE standard 80 and 81 in a ground electrode with a 10[m] counterpoise. The result showed that the RVMS analyzes the ground resistivity and the ground impedance, and the risk voltage with error below 2[%] and 5[%], respectively. -
dc.description.tableofcontents 목 차 목 차 Ⅰ 그림 및 표 목차 Ⅲ Abstract Ⅴ 제 1 장 서 론 1 1.1 연구 배경 및 필요성 1 1.2 연구 목적 및 내용 3 제 2 장 이 론 4 2.1 대지저항률 4 2.2 접지임피던스 10 2.3 위험전압 17 2.3.1 접촉전압 18 2.3.2 보폭전압 20 제 3 장 설계 및 제작 22 3.1 하드웨어 구성 22 3.2 소프트웨어 설계 23 3.3 노이즈 제거 알고리즘 28 제 4 장 평가 및 분석 31 4.1 대지저항률 32 4.2 접지임피던스 33 4.3 위험전압 34 제 5 장 결 론 39 참 고 문 헌 41 -
dc.language kor -
dc.publisher 한국해양대학교 대학원 -
dc.title 위험전압 측정시스템의 설계 및 제작 -
dc.title.alternative Design and Fabrication of a Risk Voltage Measurement System -
dc.type Thesis -
dc.date.awarded 2011-02 -
dc.contributor.alternativeName Jang Un-Yong -
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전기전자공학과 > Thesis
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